Festive Cucumber Bites

Name: Festive Cucumber Bites
Cuisine: European, Mediterranean
Ingredients: 2 large English cucumbers; 8 oz grape or cherry tomatoes; 1 (8 oz) organic cream cheese, at room temperature; 1 small (5.3 oz) container plain Greek yogurt; 3 Tbsps fresh dill, minced; 2 Tbsps chives, finely chopped; 1 tsp garlic powder; 1/2 tsp onion powder; 1/2 tsp celery salt; a tiny pinch of sea salt and pepper