1. Heat the olive oil in a large skillet over medium heat. Add the chopped onion and sauté for about 5 minutes, until it becomes translucent and fragrant.
2. Stir in the minced garlic and cook for another minute, being careful not to let it burn.
3. Add the diced tomatoes, white beans, oregano, and red pepper flakes. Stir everything together and let it simmer for about 10 minutes, allowing the flavors to meld together.
4. Gently fold in the fresh spinach leaves, stirring until they are wilted and well-coated with the tomato mixture.
5. Season with salt and black pepper to taste. Sprinkle the Parmesan cheese (or nutritional yeast) over the top and let it melt slightly.
6. Garnish with fresh basil leaves before serving for an extra touch of freshness and color.

Cooking this dish reminds me of Sunday afternoons in my grandmother’s kitchen, where she would always say, “Sigue tu corazón, y nunca te equivocarás,” meaning, “Follow your heart, and you will never go wrong.” So, don’t be afraid to adjust the seasonings to your liking!