I start by bringing a large pot of salted water to a boil. Once it’s ready, I add the tortellini and cook them just until al dente according to the package instructions. After draining, I toss them with a splash of olive oil so they don’t stick while I prepare the sauce.
In my deep skillet, I melt the butter over medium heat, then add the minced garlic. I let it sizzle just until fragrant—about a minute—before sprinkling in the flour. Whisking constantly, I cook this mixture for another minute to create a roux, which will thicken the sauce beautifully.
While whisking, I slowly pour in the milk and heavy cream. I keep stirring until the sauce starts to gently simmer and thicken. Continuous whisking is key here to avoid lumps and keep everything silky smooth.
I stir in the diced tomatoes, spinach, basil, and oregano, letting the spinach wilt and the flavors meld together. At this stage, I season with salt and pepper, tasting to get the balance just right.
Once the sauce is perfect, I add the cooked tortellini and gently toss everything together until each piece is coated in that creamy goodness. If it feels too thick, a splash of reserved pasta water does the trick.
Finally, I top the dish with extra Parmesan and a pinch of red pepper flakes. That little hit of heat against the creamy sauce is irresistible.