Hello,
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Yeah bulking your body is not a big issue just eat whatever you want eat(just kidding)
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Here, bulking is quite easier, you can bulk your body with natural foods or can go for protein/supplement which is more easier then natural Diet but it's even dangerous if you don't have a proper instructor so unless you have a proper instructor don't go with supplements.
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Now, food which you should eat for bulking,

• Dal
• curd rice
• Junk food makes you fat so do not over eat any kind of junk food
• eggs
• chaptis
• Potatoes
• Oatss
• beef
• Salmon
• Whole eggs (for lean people only eat the white part but for bulk you should eat entire egg)

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Few things which gives you instant energy which you can eat before working out or after workout

• bread and butter
• bread and peanut butter
• juice
• Banana