Simple Salsa

To make SALSA, pulse all the ingredients, except the tomato juice, in a food processor. Add the reserved tomato juice if the salsa is too thick. Drizzle salsa with olive oil, cover with plastic wrap and set aside, allowing the flavors to marry.
1 (28-ounce) can whole tomatoes, drained, reserving the juice (recommended: San Marzano)
1 small red onion, roughly chopped
1 Serrano chile
1 garlic clove, roughly chopped
2 limes, juiced
1/2 cup chopped cilantro leaves
Kosher salt
Freshly cracked black pepper
Extra-virgin olive oil, for drizzling