Finger Foods start - Avocado

Sophie started chicken dinners last weekend! Chicken thighs apple stew then mashed them up and added sweet potatoes. She seems ok with it, probably the meaty taste is still disguised by the sweet potatoes.
And then I tried avocados finger foods last night, so she could practise her pincer grasp. It was difficult to pick up those slimy small pieces and she did not succeed last night. I fed her a few pieces and she was able to squash it with her gums - no choking phew! She was a little upset with the avocados after a while, maybe she didn't like the independent taste of avocado on its own? What other finger foods can I try for this baby without teeth?