Carmelized onion salsa

 Ingredients

1 large yellow onion
2-3 large tomatoes
1 Tbsp minced garlic
1/2 - 1 tsp whole cumin seed

red pepper flakes to taste (optional)
s&p

Instructions

Chop the onion into slivers and saute slowly in olive oil with a little s&p until carmelized. Add chopped tomato and minced garlic to the pan and cook for ~5 minutes more. Mix in cumin seed, red pepper flakes (if using) and more s&p to taste. 

Serve as is to top tacos, baked potatoes, etc. or puree and mix with jarred tomato sauce for a sweeter, nuanced sauce (you can omit the cumin for uses in Italian cuisine).