Spicy Kale
| Yield: | 4 Servings |
| Categories: | Vegetables |
| 1 | lg | Onion diced; about 1 1/2 cups |
| 1 | tb | Olive oil |
| 1 | bn | Kale (about 2 pounds) |
| 2 | ts | Vinegar (or to taste) |
| 1/4 | ts | Crushed red pepper flakes (or more to taste) |
| Salt and ground pepper to taste |
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