Any steak and salad diner

Name: Any steak and salad diner
Cuisine: Portuguese, European
Ingredients: 2 medium heirloom or beefsteak tomatoes, cut into large chunks; 3 tablespoons freshly squeezed lemon juice (about 1 lemon); 1 tablespoon sherry vinegar, plus more to taste; 1 tablespoon extra-virgin olive oil kosher salt; 1 beef, pork, or lamb steak/chop (bone-in or boneless), at least 25mm thick; 2 to 4 tablespoons unsalted butter; 3 garlic cloves, smashed and peeled; 3 sprigs fresh thyme; 4 radishes, halved lengthwise and thinly sliced into half-moons; 1 medium head romaine lettuce, torn into forkable pieces; ½ cup lightly packed fresh tender herbs (such as dill, parsley, chives, basil, etc.), roughly chopped