Ingredients: 3 cloves minced garlic 1 small finely diced onion 1/4 cup butter 1/4 cup flour 2 cups milk 1 cup chicken broth 1/2 cup prepared pesto 1 pound spaghetti pasta, cooked according to recipe instructions 1 cup frozen peas 2 cups diced cooked chicken 1 cup shredded cheddar cheese 1…