Preheat oven to 425°F. Combine garlic and 3 tablespoons oil in a small skillet over medium, and then cook until garlic is browned, 2 minutes.
Add panko and cook, stirring occasionally, until lightly browned, about 3 minutes, and then stir in parsley.
Season cod with salt and place on a parchment-lined rimmed baking sheet. Top with the panko mixture and then bake until the fish flakes easily with a fork, about 12 minutes.
Heat remaining oil in a large skillet over medium-high. Add kale and cook, stirring occasionally, until lightly wilted, 2 to 3 minutes. Sprinkle with lemon juice and serve with fish and tomato wedges.