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about 4 tablespoons olive oil, divided |
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1 tablespoon fresh rosemary |
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3/4 of 1 large red onion, sliced vertically into thin strips |
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1 large zucchini, cubed into small pieces |
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4 cups kale, torn into bite-sized pieces with thick ribs removed |
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5 cloves garlic, finely minced |
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3 tablespoons balsamic vinegar |
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salt and freshly ground black pepper, to taste |
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10 ounces fontina cheese, grated |
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