Erin French runs a 40-seat restaurant called The Lost Kitchen in an old mill in tiny Freedom. She takes reservations for the season one day a year, starting midnight April 1.

This year, instead of a few dozen calls overnight, she got 10,000 in 24 hours.

Calls came in so fast that it overwhelmed her three phone lines, which hold just 40 messages. Alarms went off when emergency lines to the fire department were blocked. “This is bigger than us,” French posted on Facebook sometime after midnight. “Thousands of calls pouring in.”

Word of mouth, a few magazine mentions and a Tastemade video that got 2 million views (and won a James Beard media award) have helped turned French into a culinary star. It’s quite a triumph for a woman who grew up in Freedom, population 700 in central Maine, working in her dad’s diner.

“The fear was no one was going to show up,” French said. “Now the fear is there are too many people.”

Erin French, owner of The Lost Kitchen restaurant in Freedom, grills burgers in front of her Airstream trailer.

She’s also got a cookbook coming out May 9 from Clarkson Potter titled “The Lost Kitchen,” offering recipes for everything from mussels to moose stew – as well as the story of her unusual journey.

French started in 2010 with a $40-a-meal supper club in her apartment. At first, “I had to beg friends to come over,” she said.

But word spread and by the fifth dinner, all her guests were strangers. She opened a restaurant with her husband in Belfast, but that business closed in a messy divorce.

She started over using a 1965 Airstream to give pop-up dinners. In 2014, she opened The Lost Kitchen in an abandoned 19th-century mill that had been restored by a businessman who wanted to help the local economy. French’s restaurant, using ingredients grown by local farmers, was the perfect tenant.

French, 36, has been featured by Martha Stewart, Food & Wine and L.L. Bean, which co-produced the Tastemade video and made her a brand ambassador. Still, she wasn’t prepared for the avalanche of calls, from locals to folks from Texas, Alaska and Ireland. Eventually every person who left a message got called back, and 1,500 reservations were filled for her May to October seatings.

Dinner at The Lost Kitchen, while pricey for Maine, wouldn’t raise eyebrows in New York or Boston: $100 per person plus tax and tip for six to eight courses. The menu depends on what the farmers, fishermen and fields have to offer. A menu from last summer included tomato soup, melon salad, cheese, sea bass, corn, cherry tomatoes, baby fingerlings, arugula, polenta cake, grilled peaches and blackberries.

But The Lost Kitchen isn’t just about food. “It’s the mystery, the excitement,” French said. “There’s something a little scary. You don’t know where you’re going. You don’t know what you’re going to have for dinner. You’re going on an adventure.”

The Lost Kitchen restaurant is located in a restored 19th-century mill in the tiny town of Freedom.

Lisa Eberhart came from Virginia to eat there. “You would never find this place,” Eberhart said. “There’s no lights on that road in the dark. It’s in the middle of nowhere. There’s no sign. You can’t even see it. You’re going through the woods over a footbridge. I said to my husband, ‘This is the craziest thing.’ But it was worth every bit of it. This to me was a once in a lifetime experience. It was magical.”

Freedom is a dry town, but BYOB wine is permitted, so French’s mother runs a wine shop onsite. French cooks and serves with her sister and a friend, and at some point each night, stands up to explain “how that menu came together.” Then she gives thanks and toasts with her guests, “just as you would if you were at a friend’s house.”

Thomas Delle Donne, assistant dean at Johnson & Wales’ College of Culinary Arts in Rhode Island, says The Lost Kitchen is part of a subculture: “These dinner clubs and pop-up restaurants and underground concepts play right into that celebrity status that chefs have. Having something private and in the know is like going to see a band play at an underground club where you have to know the drummer to get in.”

French’s story is particularly inspiring. “She lived in an Airstream, she came from the bottom and like a flower, burst back into this thing. It gives people hope,” he said.

Success has brought invitations to expand. “You can have airport kiosks! You could be like Shake Shack with something on every corner!” French said. “I had ‘Top Chef’ call me and say, ‘You’d be the strong female in the season.’ And I said no. I’m being my authentic self. I literally started with nothing. I begged and borrowed. It’s been a slow payback. But right now I’m surviving pretty well.”

CHOWDER OF SWEET CLAMS

From “The Lost Kitchen” by Erin French

Servings: 4 to 6

5 pounds clams, either steamers or littlenecks

1 pound baby potatoes

Salt and pepper

3 tablespoons olive oil, plus more for serving

6 shallots, thinly sliced

3 cups heavy cream

2 cups whole milk

6 tablespoons (¾ stick) unsalted butter

Juice of 1 lemon

2 tablespoons chopped fresh parsley

2 tablespoons fresh dill

Give the clams a good rinse under cold running water, discarding any with cracked shells, and put them in a large pot with a lid. Add 2½ cups water to the pot, cover, and cook over high heat until the clams steam open, about 5 minutes. Drain and let cool to room temperature. Use an oyster or clam knife to shuck the clams, discarding any that didn’t open. Reserve the clam meat.

Wipe out the pot and add the potatoes. Pour in just enough cold water to cover and season with salt. Bring the water to a boil, then reduce the heat so the water simmers, and cook the potatoes until fork-tender, 10 to 12 minutes. Drain the potatoes and let cool to room temperature before cutting into bite-sized pieces.

Return the pot to medium heat and add the olive oil and shallots. Cook, stirring frequently, until deeply caramelized, about 20 minutes. Add the potatoes, cream, milk, and butter and bring to a gentle simmer. Add the clams and lemon juice and season with salt and pepper to taste. Cook for another minute, just to heat the clams through.

Remove the pot from the heat, sprinkle in the parsley and dill, drizzle with a bit of olive oil and serve.

Nutrition information per serving: 676 calories; 487 calories from fat; 54 g fat (31 g saturated; 1 g trans fats); 211 mg cholesterol; 835 mg sodium; 26 g carbohydrate; 2 g fiber; 8 g sugar; 22 g protein.

The Lost Kitchen restaurant seats 40 diners.