Getting One Year Old to Eat

I can’t get my one year old to eat when he’s at home. He will ONLY eat for my grandmother who keeps him most of the week. I can only get him to eat oatmeal or grilled cheese sandwiches every now and then. I’m wanting him to eat vegetables, but he just won’t do it for me. I’ve tried introducing one at a time and all together. I also never force it. He just wants a bottle for me. It’s like night and day at our house verses my grandmothers. At her house, he will sit down and eat lima bean, greens, sweet peas, chicken, corn bread and the list goes on. Please help! I have no idea what I’m doing.

I appreciate you all! 💙