2 tablespoons olive oil
1 tablespoon unsalted butter
2 anchovy fillets packed in oil, drained
2 large garlic cloves, finely chopped
2 tablespoons drained capers, chopped
8 radishes, trimmed, quartered
1 1/4 pounds large shrimp, peeled, deveined
1 head of escarole, torn into large pieces (about 10 cups)
3 tablespoons finely grated Parmesan
1 tablespoon fresh lemon juice
Kosher salt, freshly ground pepper