Best Lasagna Roll-Ups Recipe - How to Make Lasagna Roll-Ups

Ingredients

• 1/2 (1-lb.) box lasagna noodles
• 1 tbsp. extra virgin olive oil
• 1/2 large onion, chopped
• 3 cloves garlic, minced
• Kosher salt
• Freshly ground black pepper
• 1/2 tsp. red pepper flakes
• 10 oz. baby spinach
• 1 tsp. lemon zest
• 1 c. ricotta
• 1 large egg
• 1/4 c. freshly grated Parmesan, divided
• 2 c. marinara
• 2 c. mozzarella