Keto Steak Kebabs

Name: Keto Steak Kebabs
Ingredients: 1/4 cup olive oil; 3 Tbsp tamari sauce; 3 Tbsp Worcestershire sauce; 2 Tbsp red wine vinegar; 1 Tbsp Dijon mustard; 1 Tbsp garlic powder; 1 Tbsp brown granulated erythritol-based sweetener (like Swerve); 2 tsp dried Italian herb blend; 1½ tsp sea salt; 3/4 tsp freshly ground pepper; 1½ lb sirloin steak, cut into roughly 1-inch cubes; 8 oz small button mushrooms, stems removed; 2 small zucchinis, sliced into 2/3-inch thick rounds; 1 bell pepper, cut into 1-inch pieces