With the newly opened MELTology in Mount Sinai, two young business partners and former Friendly’s employees bring their fresh, experimental take on a classic comfort food to the North Shore.

The cafe-style sandwich spot, serving variations of grilled cheese, among other standard items like burgers and chicken sandwiches, marks co-owner Kevin Muller’s fourth — and most ambitious — venture in the restaurant business.

After his first restaurant in Selden, Simple Smoothie Cafe, buckled under the pressures of surrounding competition in 2012 — with nearby Tropical Smoothies and Red Mangos making his “no-name brand” obsolete — the 30-year-old Patchogue resident drove up and down North Country Road to get a grasp of what foods were most popular among locals, while brainstorming what new flavors he could bring to the area.

“I was losing big time, and I had to figure something else out,” Muller recalled, saying he had to go back to his old job at Friendly’s just to pay rent month after month while his first business went under. “I was just thinking ‘what can I do differently?’”

Just a few months later, after crafting his own spin on his grandmother’s Italian crepes recipe, Muller found great success with Crazy Crepe Cafe, bringing all variations of the traditional treat to four different locations: Selden, Mount Sinai, Smithtown and Lake Ronkonkoma. In the midst of that, he also opened up an East End food truck business in 2016.

Alongside Crazy Crepe manager and former Friendly’s co-worker Nick Mauceri, 25, Muller recently decided to convert his Crazy Crepe in Mount Sinai into MELTology, to try and reach a different market and more of the general public.

“We paired up the grilled cheeses with the dessert crepes and it works really well together, and [in a few weeks] we’re going to bring our burgers from our food truck and combine that to make grilled cheese burgers … we love seeing the place packed and everyone enjoying the food,” Muller said.

Mauceri, who said the MELTology idea started back when they worked at Friendly’s and were experimenting with the food chain’s super melt sandwiches, can’t believe how quickly the community has taken to the new restaurant — even despite its Friday the 13th opening in January.

“Luckily, everything went off without a hitch [opening day],” he said. “It’s something that’s catching on really quickly, but we couldn’t have known that it was going to be this fast. We get a great sense of pride from it, especially when you get to talk to people who say they’re really enjoying what they just ate.”

According to the owners, such menu picks like the “Chicken Parm Melt” sandwich, made up of melted mozzarella, chicken strips and marinara sauce on parmesan-crusted sourdough bread, and the “Sweetness Melt,” which features applewood smoked bacon and maple syrup, sets MELTology apart from similar sandwich spots in the area.

Kevin put himself through college at SUNY Polytechnic Institute while working, climbing the ladder from employee to general manager, and saving money to start his own business, he said, and has utilized his business degree well. With Crazy Crepes, Muller did all his own training, made his own menus and even did all the marketing.

John Muller, Kevin’s father, called his son a “workaholic.”

“I’m very proud of him, obviously, and for someone who started with only a couple thousand dollars and is now running and owning four restaurants, he’s doing really well,” John Muller said. “He’s entrepreneurial — owning a business is something he’s always wanted to do.”

MELTology, located at 5507 Nesconset Highway Suite 16, is open 11:30 a.m. to 8 p.m. Sunday through Thursday and 11:30 a.m. to 9 p.m. Friday and Saturday.

Menu items range frlom a classic grilled-cheese sandwich ($4.95); chicken parm melt ($6.95); and “Kitchen Cinque” sandwich, a multilayered melt of Parmesan-crusted sourdough, melted Cheddar, Gruyère, American, pepper jack and apple-wood smoked bacon with a slice of tomato ($6.95). Sides like mac & cheese ($2.50) and soup ($3.99/cup, $5.99/bread bowl) are coming soon. Crazy Crepe sweet crepes that have made the menu include the Dirty Banana, Oreo Crepe, S’mores Crepe, Peanute Butter Cup Crepe and Apple Pie Crepe. Prices Range from $6.95 to $7.95. Milkshakes in vanilla, chocolate, nutella, oreo and peanut butter cup are also available ($4.50).

Takeout can also be ordered online.

For more information, call (631) 509 0331 or visit www.meltology.