Green Bean, Ham, and Cheese Frittata

INGREDIENTS

• 2 teaspoons olive oil
• 1 pound green beans, trimmed and cut into 1-inch pieces
• 1/2 pound thinly sliced deli ham, cut into thin strips
• 2 bunches (12 to 16) thin scallions, cut into 1-inch pieces
• 8 large eggs
• 1 cup shredded (about 4 ounces) Fontina cheese
• Coarse salt and ground pepper