Marinated grilled flank steak with blt-smashed potatoes

Ingredients

• 2 cloves garlic, minced
• 1 tablespoon grill seasoning blend, such as Montreal Seasoning by McCormick
• 1 teaspoon smoked paprika, ground chipotles, chili powder or ground cumin
• 2 teaspoons cayenne pepper sauce, such as Frank's Red hot or Tabasco
• 1 tablespoon Worcestershire sauce
• 2 tablespoons red wine vinegar
• 1/3 Cup EVOO, plus a drizzle
• 1.5 libra flank steak
• 1.5 libra small new red-skinned potatoes
• 1 leek, trimmed of tough tops
• 4 slices thick-cut smoky bacon, such as applewood-smoked bacon, chopped
• 1 small can (15 ounces) diced tomatoes, well-drained
• 1/2 Cup sour cream, half-and-half or chicken broth
• salt
• freshly ground black pepper, to taste