amy's spinach lasagna

Ingredients

• 8 ounces lasagna noodles, cooked
• 2 tablespoons olive oil
• 2 cups chopped onion
• 2 cups sliced mushrooms
• 1/2-1 cup chopped green bell pepper
• 2 cloves minced garlic
• 2 cups chopped tomatoes
• 1 bunch fresh spinach; washed, drained, & chopped
• 1 cup chopped celery
• 1 jar spaghetti sauce (32 oz)
• 2 teaspoons dried sweet basil
• 1 teaspoon dried sage
• 1/2 teaspoon dried oregano
• 1/4 teaspoon dried thyme
• 1/4 teaspoon dried marjoram
• 2 teaspoons italian seasoning
• 3 cups shredded mozzarella
• pinch salt to taste