How to search emblemled documents in document mongoosejs?

If I have this Dishes Schema and I want to search about ingredients, comments, categories and steps of this documents how do I search.

var DishesSchema = new Schema({
    created_at: {
        type: Date,
        default: Date.now
    },
    created_by: {
        type: Schema.ObjectId,
        ref: "User"
    },
    title: String,
    description: String,
    comments: [{ type: Schema.ObjectId, ref: 'Comment' }],
    body: String,
    picture: [String],
    main_picture: String,
    likes: [{
        type: Schema.ObjectId,
        ref: "User"
    }],
    ingredients: [{ type: Schema.ObjectId, ref: 'Ingredient' }],
    categories: [{ type: Schema.ObjectId, ref: 'Category' }],
    steps: [String]
});

I find the way to search ingredients, comments, categories but how to search steps

Dishes.find().or([
                    { 'ingredients.name': new RegExp(name, "i") },
                    { description: new RegExp(name, "i") },
                    { body: new RegExp(name, "i") },
                    {},
                ]).limit(10).exec(function (err, docs) {
                    if (err){
                        response.json('error', err)
                    }
                    else{
                        response.json('info', docs)
                    }

                })

Thank you for advance!