Brush both sides of the chicken breasts with olive oil. Whirl the wasabi peas in a blender until they are the consistency of bread crumbs, and spread them on a plate. Dip one side of the chicken breasts into the peas, pressing gently so that the surface is evenly coated with the wasabi crumbs. Repeat with the other side of chicken breast. Set aside and continue with the remaining chicken breasts.
In a large, flat-bottomed nonstick skillet, heat the butter and 2 tablespoons olive oil on medium. Place the chicken breasts in the skillet and cook until the pea crust becomes crisp and starts to brown lightly, about 4 minutes, turn and lightly brown the other side. Lift the edge of each breast carefully to check the browning, and lower the heat if necessary to prevent burning. Turn the breasts and continue to cook until the fillets are medium rare, about 4 minutes. Remove to a paper towel-lined plate to drain briefly. Place chicken into a baking dish and bake on 375 degrees F for 12 to 15 minutes.
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