Agree with Anna - even now we have a good breakfast and lunch but tea is always a hit and miss affair. Around 1 year we had a lot of food refusal and throwing. I did as Anna suggested and made something for her to eat that included something I knew she'd try (for us, cereal, raisins and cheese are fail-safes). If she pushed it away or started throwing it, I'd give her one or two chances then tell her calmly 'it looks like you've finished if you are throwing your food' and take it away. I'd then offer the dessert (yoghurt, fruit) that I would have offered anyway but nothing else. Some meals she ate really well, others she barely ate a thing. But they don't starve themselves, she will eat when she's hungry. It's not so much about what they eat in one day at this age, more what they have over the course of a week or so.
One other thing you could think about - how much milk is she having at the moment? As she's nearly 12m if she's having quite a lot of milk, you could consider cutting it down a bit to make her hungrier for 'proper' food.