Load & Go Slow Cooker Soup with Mushrooms & Kielbasa

Ingredients

• 1 pound white mushrooms, halved and sliced

• 1 medium onion, chopped

• 1 medium red bell pepper, chopped

• 4 ounces kielbasa, halved lengthwise and sliced

• 3 cloves garlic, minced

• 1 teaspoon ground cumin

• 1 teaspoon paprika

• 1 teaspoon dried thyme

• ½ teaspoon salt

• ½ teaspoon ground pepper

• 4 cups low-sodium chicken broth

• 4 cups coarsely chopped spinach

• 1 tablespoon butter or extra-virgin olive oil

• 1 tablespoon red-wine vinegar