2 pounds Roma tomatoes
2 red bell peppers
2 medium yellow onions
5 garlic cloves, smashed and peeled
1 bunch cilantro, large stems trimmed
1/2 cup extra-virgin olive oil
Slowly add all but the olive oil to a food processor until finely chopped. Then, in a large pot, heat olive oil over medium-high until shimmering. Add mixture and cook, stirring occasionally, until thickened and reduced, 25 to 30 minutes (reduce heat if browning at edge). To store, let cool completely, then transfer to an airtight container; refrigerate, up to 2 weeks, or freeze, up to 6 months.