Lasagna Rolls

Ingredients

• 1 tsp. salad oil
• 1 medium-size onion, finely chopped
• 1 (28 oz.) can Italian plum tomatoes
• 1 (6 oz.) can tomato paste
• 2 tsp. sugar
• 1/2 tsp. Italian herb seasoning
• salt
• 1/2 (16 oz.) pkg. curly lasagna noodles (about 9 noodles)
• 1 (10 oz.) pkg. frozen chopped spinach
• 1 (15 oz.) container reduced-fat or fat-free Ricotta cheese
• 2 Tbsp. grated Parmesan cheese
• 1/8 tsp. ground black pepper