Grilled Shrimp and Bread with Cilantro Pesto

shallot, roughly chopped

tightly packed fresh cilantro leaves, stems removed (about 4 ounces)

garlic

red pepper flakes

olive oil

red wine vinegar

salt

lbs medium shrimp, peeled and de-veined

Wooden skewers, soaked in water or metal

loaf of bread sliced into 1 1/2 inch pieces on a bias

lemon, juiced

red pepper flakes

kosher salt and freshly cracked black pepper

olive oil for drizzling

lemons, halved and grilled