Preheat oven to 400 degrees F. Line a baking sheet with aluminum foil and place a wire rack on top.
Lay bacon on wire rack and bake for 15-20 minutes or until browned and crispy.
Meanwhile, prepare grinder salad. Whisk together mayonnaise, sriracha, red wine vinegar, garlic, salt, pepper, and oregano in a medium bowl. Combine lettuce, parmesan, banana peppers, jalapenos, and red onion in a large bowl. Add dressing, tossing until well coated.
Spread butter on sliced bread. Heat a large skillet over medium-high heat and toast bread until golden brown on both sides. Remove and repeat with remaining bread.
Assemble sandwiches. Lay avocado slices on half of the bread slices and season with salt and pepper. Arrange tomato slices and bacon on top followed by the grinder salad. Top with remaining bread and served immediately.
Notes
You can prepare the dressing for the grinder salad the day before. Wait to toss the salad with the dressing or the salad will get soggy.