Start by taking a large skillet and adding your olive oil over medium heat. Toss in the sliced onions. Stir every so often, allowing them to cook slowly. Caramelization takes time—around 25 to 30 minutes. Once they start becoming golden brown, add the garlic, bay leaves, thyme, and sugar. Remember that sugar will help deepen the flavor. Keep stirring!

Next, it’s time to enhance your onion mixture. Pour in the dry white wine. This step will not only deglaze the pan but also bring out those gorgeous caramelized flavors. Let this simmer until most of the wine evaporates—about 5 minutes will do.

After the wine has evaporated, add the butter and balsamic vinegar. Stir until the butter has melted and everything is well coated. Remove from heat and let this mixture cool slightly while you prepare the meatballs.

In a large bowl, combine the ground beef, almond flour, egg, parsley, salt, and pepper. Mix well but avoid overhandling the meat. This will help keep the meatballs tender.

Once the onion mixture has cooled down, fold it into the meat mixture. This step is where you get that rich French onion flavor into every meatball. Form the mixture into meatballs—about 1 inch in diameter.

Preheat your oven to 400°F (200°C). Place the meatballs on a baking sheet lined with parchment paper. Bake them for about 20 minutes, or until they’re browned and cooked through.

While the meatballs are baking, let’s focus on the sauce. In a saucepan, bring the chicken broth to a simmer. Whisk in the gluten-free flour to thicken it. Then, add the Dijon mustard, Worcestershire sauce, and smoked paprika. Stir this mixture well, ensuring there are no lumps.

Once the sauce has thickened, take it off the heat and stir in the Gruyère cheese until it’s melted and creamy. This is the moment where everything starts to come together.

Finally, take your baked meatballs and gently toss them in the cheesy sauce. Let them soak for a moment, allowing those flavors to meld beautifully.