Braised Coconut Kale

2 teaspoons oil or ghee 1 small yellow onion 4 large cloves garlic, peeled and minced 1 tablespoon grated ginger, from a 3-inch piece 1/2 cup sun-dried or fresh tomatoes, chopped 1 large lemon, zested and juiced (about 2 tablespoons juice) 1 dried hot red pepper or dash of red pepper flakes (opt) 15-ounce can…