In a large sauce pan add in the olive oil, shallot, garlic, oregano and pepper flakes. Saute for about 1 minute until the shallots get soft and you smell the garlic.
Add in the crushed tomatoes and tomato paste and whisk until combine. Simmer on the stove top for 15-20 minutes. The sauce will be thick and delicious!
Use right away or store in glass mason jar for up to 2 weeks in the fridge.