Lasagne Roll-Ups

Ingredients

• 8 pieces lasagne pasta (8 oz.)
• 2 Tbsp. olive oil
• 1/4 c. finely chopped onion
• 1 3/4 c. stewed tomatoes (14 1/2 oz. can)
• 2/3 (6 oz.) can tomato paste
• 1 3/4 c. Ricotta cheese (15 oz. container)
• 1 1/4 c. frozen, chopped spinach, thawed and well drained (10 oz. pkg.)
• 1 c. Mozzarella cheese, divided
• 1 egg, slightly beaten
• 2 Tbsp. grated Parmesan cheese
• 1/2 tsp. salt
• 1/4 tsp. pepper