C# reflection, lambda?

I need to do this using reflection:

@Html.Grid((IEnumerable<MyType>)list).Columns(columns =>
           {
                 columns.Add(foo => foo.Title)
                        .Titled("Custom column title")
                        .SetWidth(110);
                 columns.Add(foo => foo.Description)
                        .Sortable(true);
           }).WithPaging(20)

Now I have var g which is object created after call @Html.Grid((IEnumerable<MyType>)Model) using refletion:

var method = typeof(GridMvc.Html.GridExtensions).GetMethods()
                        .Where(mi => mi.Name == "Grid")
                        .ElementAt(0)
                        .MakeGenericMethod(new Type[] { t });
var g = method.Invoke(null, new object[] { Html, list });

So I need do something like:

g.Columns(columns =>
               {
                     columns.Add(foo => foo.Title)
                            .Titled("Custom column title")
                            .SetWidth(110);
                     columns.Add(foo => foo.Description)
                            .Sortable(true);
               }).WithPaging(20)

using reflection.

Can someone provide example code to do this?