Marinated Greek Salad

Ingredients

• ½ tsp dijon mustard
• 1 tsp kosher salt
• ½ tsp freshly ground black pepper
• ¼-½ red onion
• 1 green bell pepper
• 4 oz feta cheese
• 1/2 cup quality olive oil
• ½ lemon
• 1/4 cup red wine vinegar
• 2-3 TBSP fresh parsley
• 2-3 cloves garlic
• 1 English cucumber
• 1 tsp dried oregano leaves
• 1 lb tomatoes