In a large saute pan, add enough olive oil to coat the bottom and place over medium-high heat. Add the garlic and cook until aromatic. Add the onions and continue to saute until slightly caramelized, 6 to 7 minutes. Add the plum tomatoes and diced peppers, season with salt and cook until slightly softened, about 2 minutes. Add the crushed tomatoes, chile flakes and pimenton and cook until the sauce thickens, about 5 minutes. Add the sherry vinegar and cook for an additional minute. Taste and season.
Remove from the heat and stir in the chopped almonds and chives. Finish with a drizzle of olive oil.