Classic Lasagna with Tomato Basil Gravy

Ingredients

• 1 tbsp extra virgin olive oil
• 1 medium white onion, diced
• 3 cloves garlic, minced
• 2 cups fresh spinach, chopped
• 1 ½ cup ricotta cheese
• ½ cup grated parmesan cheese
• 2 ½ cups shredded mozzarella cheese, divided
• 1 tsp dried italian seasoning
• Pinch salt and pepper, to taste
• 3 tbsp salted butter
• 3 tbsp all purpose flour
• 2 cups whole milk
• 10 oz lasagna noodles
• 1, 24 oz jar Jersey Italian Gravy Tomato Basil