You just need to firmly press the mixture into a pan, or add a little water while the ingredients are in the food processor to make the «batter» sticky! (nutritioninthekitch.com)
Line a loaf pan with parchment paper, and firmly press the mixture firmly into the pan. (veggiesouls.com)
Use the back of a metal spoon to gently press the mixture evenly into the prepared pan and smooth the surface. (easydessert.org)