Combine agave, peanut butter, butter and brown sugar in a large bowl; beat until light and fluffy. Add egg and vanilla; mix thoroughly. Combine flour, soda and salt; mix well. Stir into peanut butter mixture. Stir in chocolate morsels and peanuts. Using a 1/4 cup measure for each cookie, drop onto ungreased cookie sheet; flatten slightly. Bake at 350°F for 8 to 10 minutes or until lightly browned. Remove to rack and cool.