Ingredients
6 garlic cloves, thinly sliced
4 oil-packed anchovy fillets, divided
1/3 cup plus 2 Tbsp. extra-virgin olive oil
1/2 cup Kalamata olives, coarsely chopped
6 Tbsp. double-concentrated tomato paste
3 Tbsp. drained capers
1/2 tsp. Diamond Crystal or 1/4 tsp. Morton kosher salt, plus more
1/4 tsp. crushed red pepper flakes, plus more for panko
8 oz. small pasta (such as ditalini, orzo, or mini shells; about 1½ cups)
5 oz. baby spinach (about 4½ cups)
1/2 cup panko