Greek Pasta Salad - Slender Kitchen

Ingredients

• 3 cups cooked pasta
• 1 English cucumber, chopped
• 1 1/2 cups cherry tomatoes, halved
• 1 green pepper, sliced
• 1/4 red onion, sliced thin (more to taste)
• 1/4 cup pepperoncini, chopped
• 3/4 cup feta cheese, cubed
• 1/2 cup Kalamata olives
• 3 tbsp olive oil
• 2 tbsp red wine vinegar
• 1 1/2 tbsp pepperoncini liquid (or lemon juice)
• 1 1/2 tsp dried oregano
• 1 1/2 tsp Dijon mustard (optional)
• Salt and pepper