Have a 400 degrees oven ready. Warm up a big pan over medium heat. Put in two tablespoons of oil and heat it until it shimmers.
Salt and pepper both sides of the fish. Cook fish over high heat.
After two to three minutes, give one of the steaks a gentle poke to see if it releases from the pan, and flip the steaks over if it does.
Depending on the thickness of your steaks, bake the pan in a preheated oven for 10 to 15 minutes.
Meanwhile, in a blender or food processor, combine all the herbs, lemon juice and zest, almonds, garlic, red pepper, and a touch of salt and pepper.
Use the pulse function to finely chop the herbs, and then slowly add the oil until you get a thick sauce. Add to a serving plate.
Season to taste with additional salt, pepper, or lemon juice.
Transfer fish to a serving platter and top with lemon zest and juice. Dress with pesto.