public IQueryable<TEntity> Find(Expression<Func<TEntity, bool>> predicate, params Expression<Func<TEntity, object>>[] includes)
    {
      var query = _entities.Where(predicate).AsQueryable();
      if (includes != null)
      {
        query = includes.Aggregate(query, (current, include) => current.Include(include));
      }
      return query;
    }

public class Product : BaseEntity<long>
  {
    [MaxLength(100)]
    public string Name { get; set; }
    [MaxLength(100)]
    public string Barcode { get; set; }
    public int ShelfLife { get; set; }
    public int Weight { get; set; }
    public bool HasAllergens { get; set; }
    [ForeignKey("Id")]
    public int CustomerId { get; set; }
    public virtual ICollection<ProductIngredient> ProductIngredient { get; set; }
  }

public class Ingredient : BaseEntity<long>
  {
    [MaxLength(100)]
    public string Name { get; set; }
    [ForeignKey("Id")]
    public int CustomerId { get; set; }
    public virtual ICollection<ProductIngredient> ProductIngredient { get; set; }
  }

public class ProductIngredient : BaseEntity<long>
  {
    [ForeignKey("Id")]
    public long? ProductId { get; set; }
    [ForeignKey("Id")]
    public long? IngredientId { get; set; }
  }

public class ProductDto
    {
      public long Id { get; set; }
      public DateTime CretedOn { get; set; }
      public DateTime UpdatedOn { get; set; }
      public string Name { get; set; }
      public string Barcode { get; set; }
      public int ShelfLife { get; set; }
      public int Weight { get; set; }
      public bool HasAllergens { get; set; }
      public int CustomerId { get; set; }
      public IList<IngredientDto> Ingredients { get; set; }
  }

var results = await _productsRepository.FindAsync(p => p.Id == id, p => p.ProductIngredient);