Bring a large pot of water to a boil over high heat.
Meanwhile, use a paring knife to cut 1-inch X’s on the bottoms of all the 3 lbs vine ripe or plum tomatoes.
Add the prepped tomatoes to the pot of boiling water and cook for 2 to 3 minutes until the skins start to split.
Strain the tomatoes in a colander and transfer them to a rimmed baking sheet. Peel them and discard the skins.
Cut the tomatoes into chunks, discarding the cores.
In a large saucepan, add the ¼ cup olive oil, 3 tablespoons garlic paste, 2 tablespoons tomato paste, 2 basil sprigs, 1 teaspoon sea salt, ½ teaspoon ground black pepper, and ¼ teaspoon crushed red pepper flakes and cook over low heat, stirring frequently, until the garlic begins to brown and become fragrant, about 2 to 3 minutes.
Add in the tomatoes and any juices, plus the 1 tablespoon light brown sugar, and stir to combine. Increase heat to medium-high and bring to a boil.
Reduce heat to medium and let the sauce simmer for 30 minutes until thickened, stirring frequently.
Remove this pot from the heat and discard the basil stems. Add in finely chopped basil leaves.
Add additional salt and pepper to taste and enjoy immediately or allow it to cool before storing in an air-tight container in the refrigerator.