TDEE and the Numbers

if your calories eaten shows 1200-1300 calories, do you eat more? and what do you eat? do you go for second serving?
or add oil to increase calories
eat a dessert?

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MY FITNESS

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i burn 500 calories 3 times a week when i go running, and strength training 3 times a week at gym

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MY MEALS ----
breakfast is 120 calories bread slices along with egg and cheese slice - 280 calories total
i have started eating fruits and veggies for snacks
sometimes sliced tomato with lemon juice, salt and pepper
today i enjoyed watermelon, 100 calories * 2 times

lunch is sometimes protein salad, or brown rice with stir fry, which is again 400 calories
dinner is 400 again
i end up with 1200-1400 calories

do i eat less? now to increase my calories do i go for second serving? is it really important to increase the calorie intake?