Greek Marinated Flank Steak with Tzatziki

Name: Greek Marinated Flank Steak with Tzatziki
Ingredients: 2 pound flank steak; 1 cup olive oil; 1/4 cup fresh lemon juice; 1/4 cup coconut aminos or soy sauce; 1 tablespoon lemon zest; 1/4 cup red wine vinegar; 1 tablespoon dijon mustard; 2 tablespoon chopped fresh mint; 1 teaspoon dried oregano; 3/4 cup plain greek yogurt (or 1/2 cup coconut cream); 1/2 cup finely chopped cucumber; 1/4 cup freshly squeezed lemon juice; 2 tablespoon finely chopped fresh dill; 1 garlic clove, crushed; 1 teaspoon kosher salt