What attracted me to the Montessori philosophy when we first started homeschooling was its emphasis on teaching toddlers and preschoolers practical life skills. My daughter was using a knife early on (she’s not quite 3 in that post).
I strongly believe that kids should be included in food prep early on. My 11 month old stands at the kitchen counter and watches me prepare dinner. She munches on zucchini, or whatever I am cutting at the time. Soon she’ll be able to help me stir or add things to a mixing bowl. When we lived in Costa Rica and I had a huge kitchen island, I would set up my then 3 month old son on his tummy time pillow so he could watch his sister and I prepare dinner. My oldest was 2 at the time and would tear lettuce for our salad. My kids have always been in the kitchen with me.
Here’s a video to get you and your children started with knife skills.