Slice the sausages into 5mm pieces and chop the green pepper. Place them in a microwave-safe container, cover with plastic wrap, and microwave at 600W for 1 minute.

Mix the microwaved ingredients with corn, cooked white rice, ketchup, powdered cheese, and black pepper until evenly combined. Divide into 4 portions.

Place a portion of ketchup rice on a spring roll wrapper, forming a stick shape. Apply the flour-water mixture to three edges of the wrapper, fold the bottom edge over the rice, and roll tightly, sealing the edges with the flour-water mixture.