Always high after lunch

I’m type1 and have been for four years. I’m kinda new to a lot of what is going on, but just take one day at a time. Every day seems dif. Something I can’t seem to figure out is why am I so high (275 or better) after lunch no matter what I eat. I can have as little as 10 carbs and it’s the same. Does your body absorb insulin dif. at dif, times of the day? I seem to do O.K. the rest of the day. If anyone can give any advice I would app. it. Thanks!!!