Cook pasta according to box directions.
While pasta is cooking, add butter to a skillet at medium to medium-high heat. Stirring frequently, allow the butter to begin to foam and then turn to a golden brown color.
Once it turns brown, remove from heat and toss in garlic and stir to heat. Add in peas and cooked pasta and toss to coat.
Season as desired and add red pepper flakes. Serve with Parmesan and fresh parsley if desired.