Spicy Tomato and Black Olive Grandma Pie

Name: Spicy Tomato and Black Olive Grandma Pie
Ingredients: 2 ¼-oz. envelopes instant yeast (about 1 Tbsp. plus 1½ tsp.); 1 Tbsp. agave nectar; 6 cups (750 g) all-purpose flour; 5 Tbsp. extra-virgin olive oil, divided, plus more; 1 Tbsp. Diamond Crystal or 1¾ tsp. Morton kosher salt, plus more; 1 15-oz. can tomato sauce; 2 Tbsp. Calabrian chile paste; 2 garlic cloves, finely grated; Freshly ground pepper; 1 small red onion, thinly sliced; ½ cup salt-cured black olives, pitted, torn; 2 large handfuls of arugula (about 4 cups); 2 tsp. balsamic vinegar