Cucumber Salad - Oliver's Markets

Ingredients

• 1 Small red onion, halved lengthwise, thinly sliced
• 2 lb. English cucumbers, cut into 1/4"-thick rounds
• 2 1/4 tsp. (or more) Kosher salt, divided
• 2 Tbsp. Extra-virgin olive oil
• 1 Tbsp. Apple cider vinegar
• 1 Tbsp. Fresh lemon juice
• 1 Tbsp. Whole-grain mustard
• 1 tsp. Honey
• 1/4 tsp. Black pepper
• 1/4 tsp. Crushed red pepper flakes (optional)
• 1/3 C. Chopped fresh dill
• 1/4 C. Thinly sliced chives