Chopped Lamb Steak with Garlicky Spinach

Name: Chopped Lamb Steak with Garlicky Spinach
Ingredients: 1/2 pound spinach, stems discarded and leaves rinsed; 3 tablespoons extra-virgin olive oil, plus more for brushing; 1 small red onion, finely diced; 1 1/2 pounds ground lamb; 2 tablespoons dry red wine, preferably Pinot Noir; 1/2 teaspoon ground cumin; 1/4 teaspoon cinnamon; Kosher salt and freshly ground black pepper; 1 large garlic clove, minced; 4 slices of peasant bread; 4 ounces fresh goat cheese, cut into 4 pieces; Marjoram leaves, for garnish