Stir-fried Broccoli and Peanuts

The original recipe comes from Eating Well.

Ingredients

⅓ cup creamy natural peanut butter
½ cup water, divided
2 tablespoons brown sugar
2 tablespoons reduced-sodium soy sauce, divided
1 tablespoon rice vinegar
2 tablespoons canola oil
1½ pounds broccoli crowns, trimmed and cut into 1-inch pieces
1 large red bell pepper, sliced
2 cloves garlic, minced
¼- ½ teaspoon crushed red pepper, or to taste
¼ cup chopped unsalted peanuts
NOTE: I added pork. Chicken, tofu or another protein source would work equally well.

Directions

1. Whisk peanut butter, ¼ cup water, brown sugar, 1 tablespoon soy sauce and vinegar in a medium bowl until smooth. Set aside. 
2. Heat oil in a wok or large skillet over medium heat. Add broccoli and cook, stirring frequently, until beginning to soften and brown in spots, about 6 minutes. 
3. Add the remaining ¼ cup water and 1 tablespoon soy sauce to the pan along with bell pepper and garlic. Cook, stirring frequently, until the pepper has softened and the liquid has evaporated, 2 to 4 minutes. 
4. Remove from the heat; stir in the reserved peanut sauce and season with crushed red pepper. Garnish with peanuts.