Does anyone have any sort of recipe for how to create a LogGroup for my Lambda function?

Would something like this work for you?

import pulumi
import pulumi_aws as aws

config = pulumi.Config()
lambda_function_name = config.get("lambdaFunctionName")
if lambda_function_name is None:
    lambda_function_name = "lambda_function_name"
# This is to optionally manage the CloudWatch Log Group for the Lambda Function.
# If skipping this resource configuration, also add "logs:CreateLogGroup" to the IAM policy below.
example = aws.cloudwatch.LogGroup("example", retention_in_days=14)
# See also the following AWS managed policy: AWSLambdaBasicExecutionRole
lambda_logging = aws.iam.Policy("lambdaLogging",
    path="/",
    description="IAM policy for logging from a lambda",
    policy="""{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Action": [
        "logs:CreateLogGroup",
        "logs:CreateLogStream",
        "logs:PutLogEvents"
      ],
      "Resource": "arn:aws:logs:*:*:*",
      "Effect": "Allow"
    }
  ]
}
""")
lambda_logs = aws.iam.RolePolicyAttachment("lambdaLogs",
    role=aws_iam_role["iam_for_lambda"]["name"],
    policy_arn=lambda_logging.arn)
test_lambda = aws.lambda_.Function("testLambda", opts=pulumi.ResourceOptions(depends_on=[
        lambda_logs,
        example,
    ]))