Melt butter in a deep skillet, medium heat. Add garlic cloves and sauté, add flour, cook and continuously stir with whisk 1 1/2 minutes. Slowly add-in milk, cream and Roma tomatoes. Add sun-dried tomatoes and whisk to separate clumps. Salt and pepper for taste. Add pepper flakes. Cook sauce until it thickens under light boil. Stir constantly. Reduce head and add grated parmesan. When cheese is melted reduce heat and add 1/4 milk if thinning is needed.