Restate the main idea/thesis, summarize your body paragraphs, and leave readers with a lasting impression of what the paper was about (i.e. provide reasoning for why readers should care about...
You could include a narrative element to your process essay, but you may want to avoid writing it as a story, as the steps might get lost in the narrative....
My biggest suggestion for expanding your writing while staying on topic is to add detail. Rather than stating bland nouns (apple), add adjectives (fresh, red apple). Similarly, you can do...
You could state your appreciation for the people who have helped you and guided you along the way so far, and then say something like, "I look forward to gaining...