Belgian Endive, Spinach, and Radicchio Salad with Mustard Vinaigrette Recipe

Ingredients

• 2 heads belgian endive
• 0.5 lb (227 g) spinach, washed, stemmed, and spun dry
• 1 head radicchio - (4 to 6 oz (170 g))
• 1 tbsp dijon mustard
• 1 tbsp balsamic vinegar
• 1 tsp tamari
• 2 garlic cloves, finely minced
• 0.25 tsp freshly-ground black pepper
• 2 tbsp olive oil
• water (optional)