Lightly brown the chicken chunks in a little bit of vegetable oil. The chicken only needs to be lightly browned because it will continue to cook in the crock pot
In a blender, combine 1 can of pineapple slices, 1/2 can of pineapple juice, brown sugar, 1/4 of the sweet onion chunks, and pineapple juice. Blend until pureed.
Prepare your crock pot with non-stick spray
Add the pineapple puree mixture to the crock pot
Stir in soy sauce and flour until fully combined
Add the lightly browned chicken and remaining 1/4 onion chunks over the pineapple mixture and stir
Cook on low for 6-8 hours: *For the last hour or so of cooking, cut the pineapple slices into about 12 chunks and add it to the chicken*
Serve over rice, or as desired.