Place all of the ingredients: both tomatoes, peppers sugar, pepper, red pepper flakes, salt and apple cider vinegar in a medium saucepan.
Bring to boil and let simmer on low heat for about 40 minutes. Your sauce should be chunky and thick. If it's not getting as thick as you want turn the heat up a bit and stir constantly. You can also slightly cover the saucepan with a lid if the sauce is bubbling out.
Serve immediately and enjoy!
Notes
Original recipe from chefsavvy.com. Please do not publish my recipe or pictures without linking back to the original post. Thank you!