Pour 8.5 oz of sun-dried tomatoes and the oil that they are packed in into the bowl of a food processor. Next, add the remaining ingredients: 2 oz feta crumbles, 1/4 cup pine nuts, 1/2 tsp kosher salt, and 2 grated garlic cloves.
Process until ingredients are combined and smooth. Note: this will be a thick pesto. If you want to thin it out, you can add more olive oil!
Notes
Sun-dried tomatoes: Oil-packed sun-dried tomatoes give the best flavor and texture. If yours are very dry, soak them in hot water for 5 minutes and drain well before using.
Texture control: For a thicker pesto rosso, use less olive oil; for a looser, more pasta-friendly sauce, add an extra tablespoon or two while blending.
Storage: Pesto rosso keeps well in the refrigerator for up to 5 days. Press plastic wrap directly onto the surface or cover with a thin layer of olive oil to prevent browning.