INGREDIENTS
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30 jumbo pasta shells, cooked according to directions listed on package
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15 oz. fresh spinach, steamed just until wilted, squeezed dry with paper towels and chopped*
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15 oz. Ricotta cheese
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1 large egg
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1 1/2 Tbsp chopped fresh basil
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1 tsp chopped fresh thyme
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1 clove garlic, finely minced
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3 cups (12 oz) mozzarella cheese, finely shredded, divided
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1 cup (3.5 oz) Parmesan cheese, finely shredded
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Salt and freshly ground black pepper, to taste
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3 cups marinara sauce, homemade or store-bought (I used this recipe)
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red pepper flakes, optional