Step 1: Cook the Lasagna Noodles

• Bring a large pot of salted water to a boil. Add the lasagna noodles and cook them according to the package instructions (usually around 8-10 minutes).
• Once cooked, drain and lay the noodles flat on a piece of parchment paper to prevent them from sticking together. Set them aside.

Step 2: Prepare the Tomato Sauce

• In a medium saucepan, heat 2 tablespoons of olive oil over medium heat. Add the minced garlic and chopped onion, sautéing for about 3-4 minutes until fragrant and soft.
• Stir in the crushed tomatoes, tomato paste, Italian seasoning, sugar, and balsamic vinegar (if using). Season with salt and pepper to taste.
• Let the sauce simmer on low heat for about 10-15 minutes, stirring occasionally, until it thickens slightly and the flavors meld together.

Step 3: Sauté the Spinach

• In a large skillet, heat 1 tablespoon of olive oil over medium heat. Add the spinach and cook for about 2-3 minutes, just until it wilts down. If using frozen spinach, make sure it’s thawed and drained before adding it to the pan.
• Season with a pinch of salt and pepper, and then remove from heat.

Step 4: Make the Butter Bean Filling

• In a large mixing bowl, combine the butter beans, ricotta cheese, oregano, basil, salt, and pepper. Use a fork or potato masher to mash the beans until they form a creamy, slightly chunky texture.
• If you want a smoother texture, you can pulse the mixture in a food processor, but I love leaving a bit of texture for added bite!

Step 5: Assemble the Lasagna

• Preheat your oven to 375°F (190°C).
• In a 9x13-inch baking dish, spread a thin layer of tomato sauce on the bottom to prevent the noodles from sticking.
• Layer the lasagna noodles on top, followed by a generous scoop of the butter bean mixture, a layer of sautéed spinach, and a drizzle of tomato sauce.
• Repeat the layers, ending with a layer of noodles on top, followed by the remaining tomato sauce and a generous sprinkle of mozzarella (or your preferred cheese).

Step 6: Bake the Lasagna

• Cover the baking dish with aluminum foil and bake in the preheated oven for 25-30 minutes.
• After the initial baking time, remove the foil and bake for an additional 10-15 minutes, or until the cheese is golden and bubbly.

Step 7: Let It Rest

• Once out of the oven, let the lasagna rest for about 10 minutes before slicing. This helps the layers set and makes for cleaner, more beautiful slices.

Pro Tip: For an extra boost of flavor, top your lasagna with fresh basil leaves just before serving. It adds a pop of color and freshness to each bite!