Step 1

Heat oil in a pan. Cook onions for 5 minutes, until they begin to soften.

Step 2

Stir in garlic and cook for 1 to 2 minutes, until fragrant.

Step 3

Stir in tomatoes.

Step 4

Add in chili flakes, salt, pepper, and oregano. Break the tomatoes up with a spoon.

Step 5

Sprinkle in the basil.

Step 6

Bring to a simmer, then lower the heat and cover the skillet with a lid. Simmer for 20 to 30 minutes, stirring every so often.

Step 7

Take out the basil and adjust seasonings as needed. Use immediately or store for later use.

Step 8

Keep it in a jar.