Shrimp and Pea Pancake

Name: Shrimp and Pea Pancake
Ingredients: 1 lemon; 3 radishes, trimmed, thinly sliced; 8 oz. sugar snap peas (about 2 cups), strings removed, thinly sliced on a diagonal, divided; 2 Tbsp. extra-virgin olive oil, plus more for drizzling; 1 tsp. Diamond Crystal or ½ tsp. Morton kosher salt, plus more; ¾ cup plain whole-milk yogurt; 2 large eggs; 2 garlic cloves, finely grated; 3 Tbsp. all-purpose flour; ½ tsp. baking powder; 4 scallions, thinly sliced; 12 oz. large shrimp, peeled, deveined, coarsely chopped; Freshly ground pepper