Place 2 tablespoons of butter into a large deep skillet and place over medium heat
Once the butter has melted, add 1 medium diced yellow onion and cook for 5-7 minutes or until the onion has softened and begins to turn translucent
Add 6 large minced garlic cloves and 1 teaspoon of crushed red pepper flakes and cook for 1-2 minutes, stirring consistently
Add 56 ounces of crushed tomatoes, mix to combine and bring to a low simmer
Do not cover the skillet tightly, but a splatter guard is highly recommend for easily cleanup later
Simmer for 20-25 minutes, stirring occasionally
Once thickened, reduce the heat to low and add 1/4 cup of dehydrated basil, 1 teaspoon of salt and 1/4 teaspoon of black pepper and stir to combine
Taste to see if additional crushed red pepper flakes, salt or black pepper is necessary
Add 1/4 cup of fresh basil and remove from the heat
Use immediately or transfer to an airtight container and chill until ready to use