Buckwheat Banana Bread Will I Gain Weight Because Of What I Ate Today?

Will i gain weight because of what i ate today? - buckwheat banana bread

I ate an apple and pear with green tea for breakfast
Salad vegetables (tomatoes, lettuce, cucumber) with 150 g of cod baked (not just the spices and lemon oil) and then like 2 blocks, a banana and 100 g of buckwheat (kasha). Will I gain weight is too much for the day?