Lightly season both sides of the salmon fillet with salt and pepper.
Heat olive oil in a grill pan or skillet over medium-high heat. Once hot, add the salmon, skin-side down, and sear for 2-3 minutes. Gently flip, and sear the other side for 2-3 minutes. During this time, use tongs to gently remove the skin. Flip one more time and cook an additional 2-3 minutes, or until cooked to your desired liking.
Meanwhile, to make the lemon basil vinaigrette, combine lemon juice, zest, olive oil, mustard, honey, garlic, basil, oregano, salt, and pepper in a blender, and blend on high until well-combined. Dressing will be a little thick and opaque in color. Taste and add more salt and pepper, if desired.
To assemble the salad, divide the salad mix among 4 bowls. Top with a salmon fillet, and 1/4 of the tomatoes, cucumber, red bell pepper, and feta. Top with desired amount of dressing (I say the more, the better!) and devour!