Tuscan Mac 'N Cheese

Ingredients

• 2 cups milk
• 1 cup heavy cream
• 1 teaspoon hot sauce
• 1/2 teaspoon dried oregano
• 1/2 teaspoon dried basil
• 1/2 teaspoon onion powder
• 1/2 teaspoon garlic salt
• 1/2 teaspoon mustard powder
• 1/2 teaspoon dried parsley
• 1/4 teaspoon smoked paprika
• red pepper flakes, to taste
• 1 (16-ounce) package medium pasta shells
• 2 tablespoons salted butter
• 1 (10-ounce) jar sun-dried tomatoes, patted dry, drained and oil reserved
• 3 cloves garlic, minced
• 2 tablespoons flour
• 1 tablespoon tomato paste
• 2 cups cheddar cheese, shredded
• 1/2 cup mozzarella cheese, shredded
• 1/4 cup parmesan cheese, shredded
• 2 cups baby spinach, optional, roughly chopped